PURE COPPER OR COPPER ALLOY POWDER FOR ADDITIVE MANUFACTURING
An object of the present invention is to provide a pure copper or copper alloy powder for use in additive manufacturing using a laser beam system, and which is capable of increasing the laser absorptance and simultaneously decreasing the oxygen concentration in an object. Provided is a pure copper or copper alloy powder with an oxide coating, wherein the oxide coating contains carbon, and a ratio of the oxygen concentration to the carbon concentration ((oxygen concentration)/(carbon concentration)) is 5 or less.
1 . A pure copper or copper alloy powder with an oxide coating, wherein the oxide coating contains carbon, and a ratio of an oxygen concentration to a carbon concentration (oxygen concentration/carbon concentration) is 5 or less, the carbon has a graphite structure, and a film thickness of the oxide coating is 5 nm or more and 500 nm or less.
2 . The pure copper or copper alloy powder according to claim 1 , wherein the oxygen concentration is 5000 wtppm or less.
3 . The pure copper and or copper alloy powder according to claim 2 , wherein the carbon concentration is 100 wtppm or more.
4 . (canceled)
5 . The pure copper or copper alloy powder according to claim 3 , wherein, when measured based on Raman spectroscopy, a maximum scattering intensity value in a Raman shift of 1000 to 2000 cm −1 exists within a range of a Raman shift of 1300 to 1700 cm −1 .
6 . The pure copper or copper alloy powder according to claim 5 , wherein, when a Cu LMM spectrum is analyzed with XPS, a maximum peak intensity exists at a binding energy of 569 to 571 eV.
7 . (canceled)
8 . The pure copper or copper alloy powder according to claim 6 , wherein an average particle size D 50 (median diameter) is 10 μm or more and 150 μm or less.
9 . The pure copper or copper alloy powder according to claim 8 , wherein the pure copper or copper alloy powder is a copper alloy containing pure copper or copper in an amount of 80 wt % or higher.
10 . The pure copper or copper alloy powder according to claim 9 , wherein the pure copper or copper alloy powder is used for additive manufacturing using a laser beam.
11 . The pure copper or copper alloy powder according to claim 1 , wherein the carbon concentration is 100 wtppm or more.
12 . The pure copper or copper alloy powder according to claim 1 , wherein, when measured based on Raman spectroscopy, a maximum scattering intensity value in a Raman shift of 1000 to 2000 cm −1 exists within a range of a Raman shift of 1300 to 1700 cm −1 .
13 . The pure copper or copper alloy powder according to claim 1 , wherein, when a Cu LMM spectrum is analyzed with XPS, a maximum peak intensity exists at a binding energy of 569 to 571 eV.
14 . The pure copper or copper alloy powder according to claim 1 , wherein an average particle size D 50 (median diameter) is 10 μm or more and 150 μm or less.
15 . The pure copper or copper alloy powder according to claim 1 , wherein the pure copper or copper alloy powder is a copper alloy containing pure copper or copper in an amount of 80 wt % or higher.
16 . The pure copper or copper alloy powder according to claim 1 , wherein the pure copper or copper alloy powder is used for additive manufacturing using a laser beam.